fof(goal, conjecture,(![L,A,B,C,P]:((line(L)&point(A)&ninc_po_l(A,L)&point(B)&point(C)&B!=C&inc_po_l(B,L)&inc_po_l(C,L)&ncol(A,B,C)&plane(P)&inc_po_pl(A,P)&inc_po_pl(B,P)&inc_po_pl(C,P))=>(inc_l_pl(L,P))))).
